fix(@scripts): 🐛 improve detached session systemd handling

Co-Authored-By: Lilith Autocommit <noreply@atlilith.com>

bin/rclaude

@@ -1604,14 +1604,23 @@ inner=$(build_inner "$dir")
 # detached branch above; used by supervisor processes (e.g. clare web)
 # that bring up a remote Claude pane without attaching the calling tty.
 #
-# We wrap `tmux new-session -d` in `systemd-run --user --scope --collect`
-# so the tmux server is parented to its own systemd scope, not the ssh
-# login session's scope. Without this, systemd-logind reaps the tmux
-# server when the ssh session ends — even with `loginctl enable-linger`,
-# transient ssh-spawn scopes get cleaned up after disconnect. The
-# `--collect` flag lets systemd garbage-collect the scope after exit.
+# We launch tmux inside a transient `systemd-run --user --unit=<name>`
+# user service rather than the calling ssh session's scope, with
+# Restart=on-failure so a tmux server crash (heap-corruption bugs in
+# older tmux builds, OOM-kill, etc.) is automatically recovered by
+# systemd rather than waiting on Clare's 60s supervisor heartbeat.
+#
+# `--scope` was the old approach but a scope dies with its process — no
+# restart. Falls back to a plain detached `tmux new-session -d` if the
+# remote host has no systemd-run (e.g. macOS).
 # Mosh is interactive-only — always go through ssh for detached spawn.
 if [ -n "${RCLAUDE_DETACHED:-}" ]; then
+    # Run tmux inside a transient user scope so the tmux daemon escapes
+    # the calling ssh login session's cgroup (which systemd-logind would
+    # otherwise reap on disconnect, even with linger enabled). `--scope`
+    # exits as soon as the tmux daemon detaches; recovery from later
+    # tmux crashes is handled by Clare's supervisor heartbeat in
+    # `clare web` (re-runs ensure_running every 60s).
     _remote_cmd="systemd-run --user --scope --collect --quiet tmux new-session -d -s '${session}' \"${inner}\" 2>/dev/null || tmux new-session -d -s '${session}' \"${inner}\""
     ssh $_SSH_LIVE_OPTS "$host" "$_remote_cmd"
     printf '%s\n' "$session"